﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/


namespace Xceed.Silverlight.Data
{
  public sealed class FixedBufferConfiguration : BufferConfiguration
  {
    #region Constructor

    public FixedBufferConfiguration( int bufferCapacity )
      : this( bufferCapacity, 0 )
    {
    }

    public FixedBufferConfiguration( int bufferCapacity, int activePreFetchSize )
      : this( bufferCapacity, activePreFetchSize, 0 )
    {
    }

    public FixedBufferConfiguration(
      int bufferCapacity,
      int activePreFetchSize,
      int passivePreFetchSize )
    {
      m_bufferCapacity = bufferCapacity;
      m_activePreFetchSize = activePreFetchSize;
      m_passivePreFetchSize = passivePreFetchSize;
    }

    #endregion

    internal override void Initialize( BufferInfo bufferInfo )
    {
      bufferInfo.SetRequestsHistoryLength( 0 );
    }

    internal override int GetActivePreFetchSize( BufferInfo bufferInfo )
    {
      return m_activePreFetchSize;
    }

    internal override int GetPassivePreFetchSize( BufferInfo bufferInfo )
    {
      return m_passivePreFetchSize;
    }

    internal override int GetBufferCapacity( BufferInfo bufferInfo )
    {
      return m_bufferCapacity;
    }

    #region Private Fields

    private int m_bufferCapacity;
    private int m_passivePreFetchSize;
    private int m_activePreFetchSize;

    #endregion
  }
}
